A261237 - cp's OEIS frontend

A261237 Number of steps needed when starting from (3^(n+1))-1 and repeatedly applying the map that replaces k with k - (sum of digits in base-3 representation of k) to encounter the first number whose base-3 representation begins with a digit other than 2.

n	a(n)
0	1
1	1
2	2
3	5
4	13
5	34
6	92
7	251
8	687
9	1885
10	5184
11	14292
12	39557
13	110094
14	308351
15	868716
16	2458964
17	6984467
18	19890809
19	56775186
20	162427605
21	465816503
22	1339163192
23	3858600035
24	11138726760
25	32199805820

[1, 1, 2, 5, 13, 34, 92, 251, 687, 1885, 5184, 14292, 39557, 110094, 308351, 868716, 2458964, 6984467, 19890809, 56775186, 162427605, 465816503, 1339163192, 3858600035, 11138726760, 32199805820]

cp's OEIS Frontend

A261237 Number of steps needed when starting from (3^(n+1))-1 and repeatedly applying the map that replaces k with k - (sum of digits in base-3 representation of k) to encounter the first number whose base-3 representation begins with a digit other than 2.

Table of values

List of values